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lenses Features
Measurement of centering errors, automated adjustment and mounting of lenses
Classical optical measurement techniques combined with modern PC technologyprovide accurate alignment, bonding and cementing of optical components and systems. These processes are fully automated and significantly reduce production time and cost. The processes involved in manufacturing optical lenses – grinding, polishing and coating – have become increasingly automated in the past few decades. Computer numerical controlled grinding and polishing machines, as well as computer-...
Photonics.com, June 2010
Dual-Mirror Adaptive Optics Systems
Researchers worldwide have leveraged advances in microelectromechanical systems (MEMS) mirror technology by using adaptive optics to correct for wavefront aberrations caused by distortion. Now, the next generation of adaptive optics systems is using...
Photonics Spectra, June 2010
Back-Illuminated CMOS Image Sensors Come to the Fore
Solid-state image sensors come in two variants: CCD and CMOS. CCDs generally offer superior image quality. However, CMOS dominates in manufacturing volume because it permits an integrated solution in which both the imaging device and processing...
Photonics Spectra, May 2010
Advantages of Polymer and Hybrid Glass-Polymer Optics
Polymer materials with optical properties are being thrust into the design forefront for new, sophisticated electro-optical applications, enabling commercial markets and applications including medical disposables, bar-code scan/recognition, security...
Photonics Spectra, April 2010
Efficient and uniform illumination with microlens-based band-limited diffusers
Uniform illumination over a certain target area is a common requirement in many applications, and oftentimes schemes must be devised to ensure that this requirement is achieved. In display systems, for example, light that illuminates a viewing...
Photonics Spectra, April 2010
Planar Lightwave Circuits Enable Next-Generation 40G/100G Networks
Many new systems rely on advanced modulation formats such as differential phase shift keying and differential quadrature phase shift keying to complement traditional architectures such as dense wavelength division multiplexing. Each method presents...
Photonics Spectra, March 2010
Old School Versus New in Optical Topology Testing
For the past 100 years or so, makers of optical components have relied on Fizeau interferometers to check surface quality. These devices have allowed manufacturers to detect defects via deviations from regular fringe patterns. However, Fizeau...
Photonics.com, December 2009
Calibrating the Thermal Camera
Thermal imaging, once the domain of the defense sector, is finding applications in a number of commercial and medical fields. As more manufacturers join the thermal camera business, the need to test these devices to recognized standards is becoming...
Photonics Spectra, December 2009
Under an Unblinking Eye
Used for displays in all manner of electronic gadgets, LCD panels are a mainstay of everyday life. Dozens of manufacturers – mainly in China, Taiwan, Japan and South Korea – produce a seemingly endless stream of these liquid crystal...
Photonics Spectra, December 2009
Micro Video Lenses Grow Up
A few years ago, micro video lenses were used in machine vision almost exclusively for limited-space and low-resolution applications. But the ongoing reductions in size and cost of optical sensors, along with increases in pixel count, are allowing...
Photonics Spectra, November 2009
Getting a foot in the door: The role of photonics in modern security systems
In times past, a guard might demand someone entering his domain to “halt and be identified.” Today that job is increasingly done by security ID systems using a variety of techniques, including photonic ones such as lasers, optical media and optic...
Photonics Spectra, October 2009
The Search for Other Earths
In recent years, astronomers have discovered more than 350 extrasolar planets, or exoplanets. But typical detection techniques are best suited for finding planets that are very dissimilar to Earth in terms of size and orbital characteristics, and it...
Photonics Spectra, October 2009
East Asia Photonics Industry: Rising to Opportunity
Views from China Affected by the global economic downturn, the output of some optical manufacturing enterprises in China hit bottom between the fourth quarter of 2008 and the first quarter of 2009, but production has been going up from the...
Photonics Spectra, August 2009
Weathering the Storm
“Financial crisis.” “Economic meltdown.” “The end of Wall Street.” Call it what you will. By now everyone knows what it is: upheaval in our financial center fueled by a hemorrhaging market that, so far, even huge infusions of cash by the federal...
Photonics Spectra, February 2009
Light Creates Tiny Patterns
The old trick, practiced by schoolboys everywhere, of concentrating a beam of sunlight through a magnifying lens to ignite paper -- or an unfortunate ant -- has been given a new twist. By using a microscopic plastic bead in place of the lens and...
Photonics.com, June 2008
A New Approach to Adaptive Optics for Materials Processing
When it comes to shaping the intensity patterns or wavefronts of light, fixed lenses are convenient, but often the need for frequent reshaping requires adaptive optical elements. There are a number of such active technologies, each with advantages...
Photonics Spectra, November 2007
Diverse Photonics Research Part of University's Curriculum
The Center for Research and Education in Optics and Lasers (CREOL) has been in existence since 1986 at the University of Central Florida (UCF) in Orlando and recently morphed into the first US college devoted solely to optics — The College of Optics...
Photonics Spectra, June 2007
Selecting the Best Optical Mount
There are many types of mounts that can be used to hold and adjust mirrors, beamsplitters, lenses and other round, thin optics. Companies offer an extensive array of such products, from inexpensive fixed mounts to sophisticated adjustable...
Photonics Spectra, October 2006
The Dirt on Cleaning Optics
Anyone who has worn glasses or driven a car knows the detrimental effects of dirt on the performance of a lens or window. The effects can be more serious in optics setups that involve laser radiation. Precision optics should be handled properly...
Photonics Spectra, March 2006
Solid Immersion Microscopy Images Quantum Dots
Researchers at Boston University and at the National Institute of Standards and Technology in Boulder, Colo., have used a lens that increases numerical aperture with solid immersion microscopy to collect photoluminescence spectra from individual...
Photonics Spectra, October 2005
Understanding Lenses: Aplanats and Achromats
Optics terminology can be confusing, but it is critical to be fluent in the language when searching for and specifying optical components. This is especially true for multielement lenses, the two most basic of which are aplanats and...
Photonics Spectra, July 2005
Transverse Bragg Resonance Lasers: A New Approach to Mode Control in Semiconductor Lasers
In the pursuit of a large-area, high-power diode laser that maintains efficient single-mode operation, we have proposed a device that lases in a fundamentally different manner, the transverse Bragg resonance mode. To date, our work has focused on...
Photonics Spectra, January 2005
Interoperability in Optical Design Tools
Today's photonics market is demanding optical design tools that not only are powerful and easy to use, but that also work well with a company's already-established set of software tools. Optical, mechanical, dynamic and other software tools work...
Photonics Spectra, October 2004
Corning Wins Circle of Excellence Award
The OptiFocus Lensed Taper from Corning Inc. of Corning, N.Y., focuses light to very small spot sizes farther from the lens, thus avoiding yield loss and a greater amount of light being reflected off the surface. The company says its uniqueness...
Photonics Spectra, January 2004
Physical and Geometric Methods Combined to Model Optics
For nearly the entire history of modern lens design, engineers have used geometric ray tracing to model light propagation through optical components. This may soon change, however, thanks to the ever-increasing speed of computers.Ray tracing is...
Photonics Spectra, August 2002
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April 2024
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